After much searching, it seems as though I may have found a tai ji quan teacher who practices and teaches Chen style. Not only that, but he teaches the style of Chen that I learned in Tangshan, which is apparently called Laojia. (Never knew that before yesterday.)
It all came about with a search for various tai ji quan teachers in Ottawa. I emailed one man, and my enquiry led to an email to a friend/peer of his, which led to a more detailed request for what styles I knew or wanted to learn, which in turn led to two other teachers that he contacted. There's a secret tai ji quan network in Ottawa, of all places!
I'm waiting to hear back from the teacher who has a class downtown now. It's felt like a bit of an odyssey, but the distant shore of learning, so to speak, is now in sight. Knock on wood...
Now if I could only apply myself as diligently in my job-search, I'd be set.